MARYLAND GEOLOGICAL SURVEY 817 



Quercus morrisoniana Hollick, 1897, Trans. N. Y. Acad. Sci., vol. xvi, p, 



131, pi. xiii, figs. 11, 12. 



Quercus morrisoniana Berry, 1903, Bull. N. Y. Bot. Garden, vol. iii, p. 72. 

 Quercus morrisoniana Hollick, 1904, Ibidem, p. 411, pi. Ixxiii, fig. 5. 

 Quercus morrisoniana Hollick, 1907, Mon. U. S. Geol. Survey, vol. 1, p. 56, 



pi. viii, fig. 4. 

 Quercus morrisoniana Berry, 1910, Bull. Torrey Bot. Club, vol. xxxvii, p. 21. 



Description. " Leaves of medium size, coriaceous, petiolate, ovate- 

 lanceolate, acuminate; medial nerve strong; secondary nerves numerous, 

 alternate, curved in passing to the borders, camptodrome, simple, or some 

 of them forking near the borders." Lesquereux, 1883. 



The present species was described from the Dakota group of Colorado 

 and has been subsequently recognized in the Magothy formation of Long 

 Island, New Jersey, and Maryland. There can be no question of the 

 identity of the eastern forms with those of the West, but their relation to 

 the genus Quercus is entirely problematical. 



Occurrence. MAGOTHY FORMATION. Eound Bay, Anne Arundel 

 County. 



Collection. Maryland Geological Survey. 



QUERCUS SEVERNENSIS Berry 

 Plate LVII, Fig. 9 



Quercus severnensis Berry, 1910, Bull. Torrey Bot. Club, vol. xxxvii, p. 22, 

 pi. viii, fig. 3. 



Description. Leaves of small size, ovate-lanceolate in outline, becom- 

 ing gradually narrowed apically, 7 cm. in length by 2.3 cm. in greatest 

 width, which is in the basal half of the leaf. Apex pointed. Base rounded. 

 Petiole short and stout. Margin entire for its basal fourth, above which 

 'it is beset with distant, prominent, serrate teeth separated by inequi- 

 lateral rounded sinuses. Midrib stout. Secondaries remote, six to eight 

 pairs, subopposite to alternate, branching from the midrib at angles of 

 from 45 to 50, but slightly curved, not prominent: basal ones sending 

 branches into the teeth, distal ones running direct to the marginal teeth. 



This species is somewhat suggestive of the much older Quercophyllum 

 clnnl-apinensis Ward of the Patapsco formation, and it is closely related to 



